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Diffstat (limited to 'sim/arm/armos.c')
| -rw-r--r-- | sim/arm/armos.c | 873 |
1 files changed, 0 insertions, 873 deletions
diff --git a/sim/arm/armos.c b/sim/arm/armos.c deleted file mode 100644 index 6deb722..0000000 --- a/sim/arm/armos.c +++ /dev/null @@ -1,873 +0,0 @@ -/* armos.c -- ARMulator OS interface: ARM6 Instruction Emulator. - Copyright (C) 1994 Advanced RISC Machines Ltd. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, see <http://www.gnu.org/licenses/>. */ - -/* This file contains a model of Demon, ARM Ltd's Debug Monitor, - including all the SWI's required to support the C library. The code in - it is not really for the faint-hearted (especially the abort handling - code), but it is a complete example. Defining NOOS will disable all the - fun, and definign VAILDATE will define SWI 1 to enter SVC mode, and SWI - 0x11 to halt the emulator. */ - -/* This must come before any other includes. */ -#include "defs.h" - -#include "ansidecl.h" -#include "libiberty.h" - -#include <time.h> -#include <errno.h> -#include <limits.h> -#include <string.h> -#include <unistd.h> /* For SEEK_SET etc. */ - -#include "armdefs.h" -#include "armos.h" -#include "armemu.h" - -#ifndef NOOS -#ifndef VALIDATE -/* #ifndef ASIM */ -#include "armfpe.h" -/* #endif */ -#endif -#endif - -/* For RDIError_BreakpointReached. */ -#include "dbg_rdi.h" - -#include "sim/callback.h" -extern host_callback *sim_callback; - -extern unsigned ARMul_OSInit (ARMul_State *); -extern unsigned ARMul_OSHandleSWI (ARMul_State *, ARMword); - -#ifndef FOPEN_MAX -#define FOPEN_MAX 64 -#endif -#ifndef PATH_MAX -#define PATH_MAX 1024 -#endif - -/* OS private Information. */ - -struct OSblock -{ - ARMword ErrorNo; -}; - -/* Bit mask of enabled SWI implementations. */ -unsigned int swi_mask = -1; - - -static ARMword softvectorcode[] = -{ - /* Installed instructions: - swi tidyexception + event; - mov lr, pc; - ldmia fp, {fp, pc}; - swi generateexception + event. */ - 0xef000090, 0xe1a0e00f, 0xe89b8800, 0xef000080, /* Reset */ - 0xef000091, 0xe1a0e00f, 0xe89b8800, 0xef000081, /* Undef */ - 0xef000092, 0xe1a0e00f, 0xe89b8800, 0xef000082, /* SWI */ - 0xef000093, 0xe1a0e00f, 0xe89b8800, 0xef000083, /* Prefetch abort */ - 0xef000094, 0xe1a0e00f, 0xe89b8800, 0xef000084, /* Data abort */ - 0xef000095, 0xe1a0e00f, 0xe89b8800, 0xef000085, /* Address exception */ - 0xef000096, 0xe1a0e00f, 0xe89b8800, 0xef000086, /* IRQ */ - 0xef000097, 0xe1a0e00f, 0xe89b8800, 0xef000087, /* FIQ */ - 0xef000098, 0xe1a0e00f, 0xe89b8800, 0xef000088, /* Error */ - 0xe1a0f00e /* Default handler */ -}; - -/* Time for the Operating System to initialise itself. */ - -unsigned -ARMul_OSInit (ARMul_State * state) -{ -#ifndef NOOS -#ifndef VALIDATE - ARMword instr, i, j; - - if (state->OSptr == NULL) - { - state->OSptr = (unsigned char *) malloc (sizeof (struct OSblock)); - if (state->OSptr == NULL) - { - perror ("OS Memory"); - exit (15); - } - } - - state->Reg[13] = ADDRSUPERSTACK; /* Set up a stack for the current mode... */ - ARMul_SetReg (state, SVC32MODE, 13, ADDRSUPERSTACK);/* ...and for supervisor mode... */ - ARMul_SetReg (state, ABORT32MODE, 13, ADDRSUPERSTACK);/* ...and for abort 32 mode... */ - ARMul_SetReg (state, UNDEF32MODE, 13, ADDRSUPERSTACK);/* ...and for undef 32 mode... */ - ARMul_SetReg (state, SYSTEMMODE, 13, ADDRSUPERSTACK);/* ...and for system mode. */ - instr = 0xe59ff000 | (ADDRSOFTVECTORS - 8); /* Load pc from soft vector */ - - for (i = ARMul_ResetV; i <= ARMFIQV; i += 4) - /* Write hardware vectors. */ - ARMul_WriteWord (state, i, instr); - - SWI_vector_installed = 0; - - for (i = ARMul_ResetV; i <= ARMFIQV + 4; i += 4) - { - ARMul_WriteWord (state, ADDRSOFTVECTORS + i, SOFTVECTORCODE + i * 4); - ARMul_WriteWord (state, ADDRSOFHANDLERS + 2 * i + 4L, - SOFTVECTORCODE + sizeof (softvectorcode) - 4L); - } - - for (i = 0; i < sizeof (softvectorcode); i += 4) - ARMul_WriteWord (state, SOFTVECTORCODE + i, softvectorcode[i / 4]); - - ARMul_ConsolePrint (state, ", Demon 1.01"); - -/* #ifndef ASIM */ - - /* Install FPE. */ - for (i = 0; i < fpesize; i += 4) - /* Copy the code. */ - ARMul_WriteWord (state, FPESTART + i, fpecode[i >> 2]); - - /* Scan backwards from the end of the code. */ - for (i = FPESTART + fpesize;; i -= 4) - { - /* When we reach the marker value, break out of - the loop, leaving i pointing at the maker. */ - if ((j = ARMul_ReadWord (state, i)) == 0xffffffff) - break; - - /* If necessary, reverse the error strings. */ - if (state->bigendSig && j < 0x80000000) - { - /* It's part of the string so swap it. */ - j = ((j >> 0x18) & 0x000000ff) | - ((j >> 0x08) & 0x0000ff00) | - ((j << 0x08) & 0x00ff0000) | ((j << 0x18) & 0xff000000); - ARMul_WriteWord (state, i, j); - } - } - - /* Copy old illegal instr vector. */ - ARMul_WriteWord (state, FPEOLDVECT, ARMul_ReadWord (state, ARMUndefinedInstrV)); - /* Install new vector. */ - ARMul_WriteWord (state, ARMUndefinedInstrV, FPENEWVECT (ARMul_ReadWord (state, i - 4))); - ARMul_ConsolePrint (state, ", FPE"); - -/* #endif ASIM */ -#endif /* VALIDATE */ -#endif /* NOOS */ - - /* Intel do not want DEMON SWI support. */ - if (state->is_XScale) - swi_mask = SWI_MASK_ANGEL; - - return TRUE; -} - -/* These are libgloss defines, but seem to be common across all supported ARM - targets at the moment. These should get moved to the callback open_map. */ -#define TARGET_O_BINARY 0 -#define TARGET_O_APPEND 0x8 -#define TARGET_O_CREAT 0x200 -#define TARGET_O_RDONLY 0x0 -#define TARGET_O_RDWR 0x2 -#define TARGET_O_TRUNC 0x400 -#define TARGET_O_WRONLY 0x1 - -static const int translate_open_mode[] = -{ - TARGET_O_RDONLY, /* "r" */ - TARGET_O_RDONLY + TARGET_O_BINARY, /* "rb" */ - TARGET_O_RDWR, /* "r+" */ - TARGET_O_RDWR + TARGET_O_BINARY, /* "r+b" */ - TARGET_O_WRONLY + TARGET_O_CREAT + TARGET_O_TRUNC, /* "w" */ - TARGET_O_WRONLY + TARGET_O_BINARY + TARGET_O_CREAT + TARGET_O_TRUNC, /* "wb" */ - TARGET_O_RDWR + TARGET_O_CREAT + TARGET_O_TRUNC, /* "w+" */ - TARGET_O_RDWR + TARGET_O_BINARY + TARGET_O_CREAT + TARGET_O_TRUNC, /* "w+b" */ - TARGET_O_WRONLY + TARGET_O_APPEND + TARGET_O_CREAT, /* "a" */ - TARGET_O_WRONLY + TARGET_O_BINARY + TARGET_O_APPEND + TARGET_O_CREAT, /* "ab" */ - TARGET_O_RDWR + TARGET_O_APPEND + TARGET_O_CREAT, /* "a+" */ - TARGET_O_RDWR + TARGET_O_BINARY + TARGET_O_APPEND + TARGET_O_CREAT /* "a+b" */ -}; - -static void -SWIWrite0 (ARMul_State * state, ARMword addr) -{ - ARMword temp; - struct OSblock *OSptr = (struct OSblock *) state->OSptr; - - while ((temp = ARMul_SafeReadByte (state, addr++)) != 0) - { - char buffer = temp; - /* Note - we cannot just cast 'temp' to a (char *) here, - since on a big-endian host the byte value will end - up in the wrong place and a nul character will be printed. */ - (void) sim_callback->write_stdout (sim_callback, & buffer, 1); - } - - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); -} - -static void -WriteCommandLineTo (ARMul_State * state, ARMword addr) -{ - ARMword temp; - char *cptr = state->CommandLine; - - if (cptr == NULL) - cptr = "\0"; - do - { - temp = (ARMword) * cptr++; - ARMul_SafeWriteByte (state, addr++, temp); - } - while (temp != 0); -} - -static int -ReadFileName (ARMul_State * state, char *buf, ARMword src, size_t n) -{ - struct OSblock *OSptr = (struct OSblock *) state->OSptr; - char *p = buf; - - while (n--) - if ((*p++ = ARMul_SafeReadByte (state, src++)) == '\0') - return 0; - OSptr->ErrorNo = cb_host_to_target_errno (sim_callback, ENAMETOOLONG); - state->Reg[0] = -1; - return -1; -} - -static void -SWIopen (ARMul_State * state, ARMword name, ARMword SWIflags) -{ - struct OSblock *OSptr = (struct OSblock *) state->OSptr; - char buf[PATH_MAX]; - int flags; - - if (ReadFileName (state, buf, name, sizeof buf) == -1) - return; - - /* Now we need to decode the Demon open mode. */ - if (SWIflags >= ARRAY_SIZE (translate_open_mode)) - flags = 0; - else - flags = translate_open_mode[SWIflags]; - - /* Filename ":tt" is special: it denotes stdin/out. */ - if (strcmp (buf, ":tt") == 0) - { - if (flags == TARGET_O_RDONLY) /* opening tty "r" */ - state->Reg[0] = 0; /* stdin */ - else - state->Reg[0] = 1; /* stdout */ - } - else - { - state->Reg[0] = sim_callback->open (sim_callback, buf, flags); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - } -} - -static void -SWIread (ARMul_State * state, ARMword f, ARMword ptr, ARMword len) -{ - struct OSblock *OSptr = (struct OSblock *) state->OSptr; - int res; - int i; - char *local = malloc (len); - - if (local == NULL) - { - sim_callback->printf_filtered - (sim_callback, - "sim: Unable to read 0x%lx bytes - out of memory\n", - (long)len); - return; - } - - res = sim_callback->read (sim_callback, f, local, len); - if (res > 0) - for (i = 0; i < res; i++) - ARMul_SafeWriteByte (state, ptr + i, local[i]); - - free (local); - state->Reg[0] = res == -1 ? -1 : len - res; - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); -} - -static void -SWIwrite (ARMul_State * state, ARMword f, ARMword ptr, ARMword len) -{ - struct OSblock *OSptr = (struct OSblock *) state->OSptr; - int res; - ARMword i; - char *local = malloc (len); - - if (local == NULL) - { - sim_callback->printf_filtered - (sim_callback, - "sim: Unable to write 0x%lx bytes - out of memory\n", - (long) len); - return; - } - - for (i = 0; i < len; i++) - local[i] = ARMul_SafeReadByte (state, ptr + i); - - res = sim_callback->write (sim_callback, f, local, len); - state->Reg[0] = res == -1 ? -1 : len - res; - free (local); - - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); -} - -static void -SWIflen (ARMul_State * state, ARMword fh) -{ - struct OSblock *OSptr = (struct OSblock *) state->OSptr; - ARMword addr; - - if (fh > FOPEN_MAX) - { - OSptr->ErrorNo = EBADF; - state->Reg[0] = -1L; - return; - } - - addr = sim_callback->lseek (sim_callback, fh, 0, SEEK_CUR); - - state->Reg[0] = sim_callback->lseek (sim_callback, fh, 0L, SEEK_END); - (void) sim_callback->lseek (sim_callback, fh, addr, SEEK_SET); - - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); -} - -static void -SWIremove (ARMul_State * state, ARMword path) -{ - char buf[PATH_MAX]; - - if (ReadFileName (state, buf, path, sizeof buf) != -1) - { - struct OSblock *OSptr = (struct OSblock *) state->OSptr; - state->Reg[0] = sim_callback->unlink (sim_callback, buf); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - } -} - -static void -SWIrename (ARMul_State * state, ARMword old, ARMword new) -{ - char oldbuf[PATH_MAX], newbuf[PATH_MAX]; - - if (ReadFileName (state, oldbuf, old, sizeof oldbuf) != -1 - && ReadFileName (state, newbuf, new, sizeof newbuf) != -1) - { - struct OSblock *OSptr = (struct OSblock *) state->OSptr; - state->Reg[0] = sim_callback->rename (sim_callback, oldbuf, newbuf); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - } -} - -/* The emulator calls this routine when a SWI instruction is encuntered. - The parameter passed is the SWI number (lower 24 bits of the instruction). */ - -unsigned -ARMul_OSHandleSWI (ARMul_State * state, ARMword number) -{ - struct OSblock * OSptr = (struct OSblock *) state->OSptr; - int unhandled = FALSE; - - switch (number) - { - case SWI_Read: - if (swi_mask & SWI_MASK_DEMON) - SWIread (state, state->Reg[0], state->Reg[1], state->Reg[2]); - else - unhandled = TRUE; - break; - - case SWI_Write: - if (swi_mask & SWI_MASK_DEMON) - SWIwrite (state, state->Reg[0], state->Reg[1], state->Reg[2]); - else - unhandled = TRUE; - break; - - case SWI_Open: - if (swi_mask & SWI_MASK_DEMON) - SWIopen (state, state->Reg[0], state->Reg[1]); - else - unhandled = TRUE; - break; - - case SWI_Clock: - if (swi_mask & SWI_MASK_DEMON) - { - /* Return number of centi-seconds. */ - state->Reg[0] = -#ifdef CLOCKS_PER_SEC - (CLOCKS_PER_SEC >= 100) - ? (ARMword) (clock () / (CLOCKS_PER_SEC / 100)) - : (ARMword) ((clock () * 100) / CLOCKS_PER_SEC); -#else - /* Presume unix... clock() returns microseconds. */ - (ARMword) (clock () / 10000); -#endif - OSptr->ErrorNo = errno; - } - else - unhandled = TRUE; - break; - - case SWI_Time: - if (swi_mask & SWI_MASK_DEMON) - { - state->Reg[0] = (ARMword) sim_callback->time (sim_callback); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - } - else - unhandled = TRUE; - break; - - case SWI_Close: - if (swi_mask & SWI_MASK_DEMON) - { - state->Reg[0] = sim_callback->close (sim_callback, state->Reg[0]); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - } - else - unhandled = TRUE; - break; - - case SWI_Flen: - if (swi_mask & SWI_MASK_DEMON) - SWIflen (state, state->Reg[0]); - else - unhandled = TRUE; - break; - - case SWI_Exit: - if (swi_mask & SWI_MASK_DEMON) - state->Emulate = FALSE; - else - unhandled = TRUE; - break; - - case SWI_Seek: - if (swi_mask & SWI_MASK_DEMON) - { - /* We must return non-zero for failure. */ - state->Reg[0] = -1 >= sim_callback->lseek (sim_callback, state->Reg[0], state->Reg[1], SEEK_SET); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - } - else - unhandled = TRUE; - break; - - case SWI_WriteC: - if (swi_mask & SWI_MASK_DEMON) - { - char tmp = state->Reg[0]; - (void) sim_callback->write_stdout (sim_callback, &tmp, 1); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - } - else - unhandled = TRUE; - break; - - case SWI_Write0: - if (swi_mask & SWI_MASK_DEMON) - SWIWrite0 (state, state->Reg[0]); - else - unhandled = TRUE; - break; - - case SWI_GetErrno: - if (swi_mask & SWI_MASK_DEMON) - state->Reg[0] = OSptr->ErrorNo; - else - unhandled = TRUE; - break; - - case SWI_GetEnv: - if (swi_mask & SWI_MASK_DEMON) - { - state->Reg[0] = ADDRCMDLINE; - if (state->MemSize) - state->Reg[1] = state->MemSize; - else - state->Reg[1] = ADDRUSERSTACK; - - WriteCommandLineTo (state, state->Reg[0]); - } - else - unhandled = TRUE; - break; - - case SWI_Breakpoint: - state->EndCondition = RDIError_BreakpointReached; - state->Emulate = FALSE; - break; - - case SWI_Remove: - if (swi_mask & SWI_MASK_DEMON) - SWIremove (state, state->Reg[0]); - else - unhandled = TRUE; - break; - - case SWI_Rename: - if (swi_mask & SWI_MASK_DEMON) - SWIrename (state, state->Reg[0], state->Reg[1]); - else - unhandled = TRUE; - break; - - case SWI_IsTTY: - if (swi_mask & SWI_MASK_DEMON) - { - state->Reg[0] = sim_callback->isatty (sim_callback, state->Reg[0]); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - } - else - unhandled = TRUE; - break; - - /* Handle Angel SWIs as well as Demon ones. */ - case AngelSWI_ARM: - case AngelSWI_Thumb: - if (swi_mask & SWI_MASK_ANGEL) - { - ARMword addr; - ARMword temp; - - /* R1 is almost always a parameter block. */ - addr = state->Reg[1]; - /* R0 is a reason code. */ - switch (state->Reg[0]) - { - case -1: - /* This can happen when a SWI is interrupted (eg receiving a - ctrl-C whilst processing SWIRead()). The SWI will complete - returning -1 in r0 to the caller. If GDB is then used to - resume the system call the reason code will now be -1. */ - return TRUE; - - /* Unimplemented reason codes. */ - case AngelSWI_Reason_ReadC: - case AngelSWI_Reason_TmpNam: - case AngelSWI_Reason_System: - case AngelSWI_Reason_EnterSVC: - default: - state->Emulate = FALSE; - return FALSE; - - case AngelSWI_Reason_Clock: - /* Return number of centi-seconds. */ - state->Reg[0] = -#ifdef CLOCKS_PER_SEC - (CLOCKS_PER_SEC >= 100) - ? (ARMword) (clock () / (CLOCKS_PER_SEC / 100)) - : (ARMword) ((clock () * 100) / CLOCKS_PER_SEC); -#else - /* Presume unix... clock() returns microseconds. */ - (ARMword) (clock () / 10000); -#endif - OSptr->ErrorNo = errno; - break; - - case AngelSWI_Reason_Time: - state->Reg[0] = (ARMword) sim_callback->time (sim_callback); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - break; - - case AngelSWI_Reason_WriteC: - { - char tmp = ARMul_SafeReadByte (state, addr); - (void) sim_callback->write_stdout (sim_callback, &tmp, 1); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - break; - } - - case AngelSWI_Reason_Write0: - SWIWrite0 (state, addr); - break; - - case AngelSWI_Reason_Close: - state->Reg[0] = sim_callback->close (sim_callback, ARMul_ReadWord (state, addr)); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - break; - - case AngelSWI_Reason_Seek: - state->Reg[0] = -1 >= sim_callback->lseek (sim_callback, ARMul_ReadWord (state, addr), - ARMul_ReadWord (state, addr + 4), - SEEK_SET); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - break; - - case AngelSWI_Reason_FLen: - SWIflen (state, ARMul_ReadWord (state, addr)); - break; - - case AngelSWI_Reason_GetCmdLine: - WriteCommandLineTo (state, ARMul_ReadWord (state, addr)); - break; - - case AngelSWI_Reason_HeapInfo: - /* R1 is a pointer to a pointer. */ - addr = ARMul_ReadWord (state, addr); - - /* Pick up the right memory limit. */ - if (state->MemSize) - temp = state->MemSize; - else - temp = ADDRUSERSTACK; - - ARMul_WriteWord (state, addr, 0); /* Heap base. */ - ARMul_WriteWord (state, addr + 4, temp); /* Heap limit. */ - ARMul_WriteWord (state, addr + 8, temp); /* Stack base. */ - ARMul_WriteWord (state, addr + 12, temp); /* Stack limit. */ - break; - - case AngelSWI_Reason_ReportException: - if (state->Reg[1] == ADP_Stopped_ApplicationExit) - state->Reg[0] = 0; - else - state->Reg[0] = -1; - state->Emulate = FALSE; - break; - - case ADP_Stopped_ApplicationExit: - state->Reg[0] = 0; - state->Emulate = FALSE; - break; - - case ADP_Stopped_RunTimeError: - state->Reg[0] = -1; - state->Emulate = FALSE; - break; - - case AngelSWI_Reason_Errno: - state->Reg[0] = OSptr->ErrorNo; - break; - - case AngelSWI_Reason_Open: - SWIopen (state, - ARMul_ReadWord (state, addr), - ARMul_ReadWord (state, addr + 4)); - break; - - case AngelSWI_Reason_Read: - SWIread (state, - ARMul_ReadWord (state, addr), - ARMul_ReadWord (state, addr + 4), - ARMul_ReadWord (state, addr + 8)); - break; - - case AngelSWI_Reason_Write: - SWIwrite (state, - ARMul_ReadWord (state, addr), - ARMul_ReadWord (state, addr + 4), - ARMul_ReadWord (state, addr + 8)); - break; - - case AngelSWI_Reason_IsTTY: - state->Reg[0] = sim_callback->isatty (sim_callback, - ARMul_ReadWord (state, addr)); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - break; - - case AngelSWI_Reason_Remove: - SWIremove (state, - ARMul_ReadWord (state, addr)); - break; - - case AngelSWI_Reason_Rename: - SWIrename (state, - ARMul_ReadWord (state, addr), - ARMul_ReadWord (state, addr + 4)); - break; - } - } - else - unhandled = TRUE; - break; - - /* The following SWIs are generated by the softvectorcode[] - installed by default by the simulator. */ - case 0x91: /* Undefined Instruction. */ - { - ARMword addr = state->RegBank[UNDEFBANK][14] - 4; - - sim_callback->printf_filtered - (sim_callback, "sim: exception: Unhandled Instruction '0x%08x' at 0x%08x. Stopping.\n", - ARMul_ReadWord (state, addr), addr); - state->EndCondition = RDIError_SoftwareInterrupt; - state->Emulate = FALSE; - return FALSE; - } - - case 0x90: /* Reset. */ - case 0x92: /* SWI. */ - /* These two can be safely ignored. */ - break; - - case 0x93: /* Prefetch Abort. */ - case 0x94: /* Data Abort. */ - case 0x95: /* Address Exception. */ - case 0x96: /* IRQ. */ - case 0x97: /* FIQ. */ - case 0x98: /* Error. */ - unhandled = TRUE; - break; - - case -1: - /* This can happen when a SWI is interrupted (eg receiving a - ctrl-C whilst processing SWIRead()). The SWI will complete - returning -1 in r0 to the caller. If GDB is then used to - resume the system call the reason code will now be -1. */ - return TRUE; - - case 0x180001: /* RedBoot's Syscall SWI in ARM mode. */ - if (swi_mask & SWI_MASK_REDBOOT) - { - switch (state->Reg[0]) - { - /* These numbers are defined in libgloss/syscall.h - but the simulator should not be dependend upon - libgloss being installed. */ - case 1: /* Exit. */ - state->Emulate = FALSE; - /* Copy exit code into r0. */ - state->Reg[0] = state->Reg[1]; - break; - - case 2: /* Open. */ - SWIopen (state, state->Reg[1], state->Reg[2]); - break; - - case 3: /* Close. */ - state->Reg[0] = sim_callback->close (sim_callback, state->Reg[1]); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - break; - - case 4: /* Read. */ - SWIread (state, state->Reg[1], state->Reg[2], state->Reg[3]); - break; - - case 5: /* Write. */ - SWIwrite (state, state->Reg[1], state->Reg[2], state->Reg[3]); - break; - - case 6: /* Lseek. */ - state->Reg[0] = sim_callback->lseek (sim_callback, - state->Reg[1], - state->Reg[2], - state->Reg[3]); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - break; - - case 17: /* Utime. */ - state->Reg[0] = state->Reg[1] = (ARMword) sim_callback->time (sim_callback); - OSptr->ErrorNo = sim_callback->get_errno (sim_callback); - break; - - case 7: /* Unlink. */ - case 8: /* Getpid. */ - case 9: /* Kill. */ - case 10: /* Fstat. */ - case 11: /* Sbrk. */ - case 12: /* Argvlen. */ - case 13: /* Argv. */ - case 14: /* ChDir. */ - case 15: /* Stat. */ - case 16: /* Chmod. */ - case 18: /* Time. */ - sim_callback->printf_filtered - (sim_callback, - "sim: unhandled RedBoot syscall `%d' encountered - " - "returning ENOSYS\n", - state->Reg[0]); - state->Reg[0] = -1; - OSptr->ErrorNo = cb_host_to_target_errno - (sim_callback, ENOSYS); - break; - case 1001: /* Meminfo. */ - { - ARMword totmem = state->Reg[1], - topmem = state->Reg[2]; - ARMword stack = state->MemSize > 0 - ? state->MemSize : ADDRUSERSTACK; - if (totmem != 0) - ARMul_WriteWord (state, totmem, stack); - if (topmem != 0) - ARMul_WriteWord (state, topmem, stack); - state->Reg[0] = 0; - break; - } - - default: - sim_callback->printf_filtered - (sim_callback, - "sim: unknown RedBoot syscall '%d' encountered - ignoring\n", - state->Reg[0]); - return FALSE; - } - break; - } - ATTRIBUTE_FALLTHROUGH; - - default: - unhandled = TRUE; - } - - if (unhandled) - { - if (SWI_vector_installed) - { - ARMword cpsr; - ARMword i_size; - - cpsr = ARMul_GetCPSR (state); - i_size = INSN_SIZE; - - ARMul_SetSPSR (state, SVC32MODE, cpsr); - - cpsr &= ~0xbf; - cpsr |= SVC32MODE | 0x80; - ARMul_SetCPSR (state, cpsr); - - state->RegBank[SVCBANK][14] = state->Reg[14] = state->Reg[15] - i_size; - state->NextInstr = RESUME; - state->Reg[15] = state->pc = ARMSWIV; - FLUSHPIPE; - } - else - { - sim_callback->printf_filtered - (sim_callback, - "sim: unknown SWI encountered - %x - ignoring\n", - number); - return FALSE; - } - } - - return TRUE; -} |